|Week|Date|Opponent|Result|Record|Attendance|
|---|---|---|---|---|---|
|1|September 11, 2005|Indianapolis Colts|L 24–7|0–1–0|70,501|
|2|September 18, 2005|at Tennessee Titans|L 25–10|0–2–0|69,149|
|3|Bye|Bye|Bye|Bye|Bye|
|4|October 2, 2005|New York Jets|W 13–3|1–2–0|70,479|
|5|October 9, 2005|at Detroit Lions|L 35–17|1–3–0|61,201|
|6|October 16, 2005|Cleveland Browns|W 16–3|2–3–0|70,196|
|7|October 23, 2005|at Chicago Bears|L 10–6|2–4–0|62,102|
|8|October 31, 2005|at Pittsburgh Steelers|L 20–19|2–5–0|64,178|
|9|November 6, 2005|Cincinnati Bengals|L 21–9|2–6–0|70,540|
|10|November 13, 2005|at Jacksonville Jaguars|L 30–3|2–7–0|66,107|
|11|November 20, 2005|Pittsburgh Steelers|W 16–13 OT|3–7–0|70,601|
|12|November 27, 2005|at Cincinnati Bengals|L 42–29|3–8–0|65,680|
|13|December 4, 2005|Houston Texans|W 16–15|4–8–0|69,909|
|14|December 11, 2005|at Denver Broncos|L 12–10|4–9–0|75,651|
|15|December 19, 2005|Green Bay Packers|W 48–3|5–9–0|70,604|
|16|December 25, 2005|Minnesota Vikings|W 30–23|6–9–0|70,246|
|17|January 1, 2006|at Cleveland Browns|L 20–16|6–10–0|69,871|

Question: what is the difference in attendance between the first game in september and the last game in january?
Answer: 630